There's a lot we just don't know about the Covid-19 Coronavirus, and it turns out an assumption adopted by many countries is just wrong:  Checking travelers for symptoms is not enough to avoid spreading the virus.

A new German study says checking travelers for symptoms such as fever or cough doesn't cut it.  The report appearing in the New England Journal of Medicine assessed the screening process used on 126 Germans who were evacuated from Wuhan, China, back home to Germany.  They didn't display symptoms, but two of the travelers ultimately tested positive for the coronavirus.

Meanwhile, some 500 passengers are disembarking from the Diamond Princess cruise ship anchored off Yokohama, Japan.  Thousands of passengers and crew had been stuck on the boat for two weeks after Japanese officials slapped a quarantine on it.  Ultimately, 545 people which is almost 15 percent of the passengers on the ship ended up catching the Covid-19 coronavirus.  Officials say the passengers leaving the vessel today have all tested negative for the virus.

The number of Covid-19 deaths is now above 2,009; most are in mainland China, with two more in Hong Kong, and one each in the Philippines, Japan, and France.  Globally, more than 75,000 people have been infected.